Serena Williams holds her newborn baby Alexis Jr in her arms with a drip still attached to her hand

Williams is one of the most successful tennis players of all time, clinching 23 Grand Slam titles.

And she has been dating Ohanian for the last few years, firstly in secret, before they announced their engagement in December.

ACE DAD Who is Alexis Ohanian, the Reddit co-founder whose fiancée Serena Williams has given birth to their first child?

The 35-year-old shared several videos showing the story of her pregnancy on Instagram after giving birth, showing her journey from ultrasound, baby bump selfies and assembling a nursery.

According to reports in the US, the new baby girl weighed 6lb 14oz and the entire floor of St Mary’s Hospital in West Palm Beach, Florida, was cleared to make way for Serena as a security measure and to help maintain her privacy.